: 12.3-x has some (what look like) neat control functions for NAT. A kind : of break or upper limit of the number of NAT translations which is : configurable at the IP level. As Terry mentioned here is the link for what I was talking about: http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_feature_guide09186a00801d09f0.html j